Supporting harness for furnace-arch walls



July 16, 1929. J, F. BOO'RAEM 1.720,941

SUPPORTING HARNESS FOR FURNACE ARCH WALLS Filed April 1, 1926 2Sheets-Sheet 1 INVENTOR 7 ATTOR EY July 16, 1929. ,1. F. BOORAEM1720,941-

SUPPORTING HARNESS FOR FURNACE ARCH WALLS Filed April 1926 2Sheets-Sheet 2 ATTOR EY Fill Patented July 16, 1929.

STATES JOHN FRANCIS BOORAEM, OF GREENWICH, CONNECTICUT.

SUPPORTING HARNESS FOR FURNACE-ARCH WALLS.

Application filed April 1,

This invention relates to improved supporting harness for furnace archwalls, and has for its primary object to provide a harness structurewhich is especially designed and adapted for use in connection with archwall blocks of the type shown and described in my co-pending applicationfor patent filed February 20, 1926, Serial No.'89,537.

It is the purpose of my present improvements to provide such a harnessstructure for supporting or suspending the arch blocks in rows and whichembodies air receiving pipes or conduits preferably constructed insections and provided. with means whereby air may be supplied inadequate volume to the passages of the blocks.

ln a preferred embodiment of my present improven'ients, I provide theblocks with reduced portions at one end forming recesses which inconjunction with similar recesses in the blocks of the adjacent rowsreceive the. air pipes or conduits, and removable wedge members fordetachably interlocking the block with said conduits and sujn'iortingthe block in suspended relation thereto whereby a continuouslongitudinal air receiving channel is produced between the under side ofthe conduit and the blocks of adjacent rows and into which the passagesof said blocks open at their upper ends. Each pipe or conduit isprovided in its lower portion with a number of openings through whichthe air is supplied to said channels for distribution to the ingressends of the passages of the several blocks through which it is drawn bythe draft throngl'i the combustion chamber of the furnace.

lit is another object of the invention to provide a harness structurefor the arch blocks of sectional form, a plurality of rows of blocksbeing suspended from each section of the harness, and being capable ofindependent relative expansion and easy and quick individual applicationto or detached from the harness structure.

lVith the above and other objects in view, the invention consists in theimproved arch wall supporting or suspending harness, and in the form,construction and relative arnngement of its several parts as will behere inaftcr more fully described, illustrated in the accompanyingdrawings, and subsequently in corporated in the subjoined claims.

In the drawings, wherein I have illustrated one simple and practicalembodiment of my present improvements, and in which similar ting ends ofaligned 1926. Serial No. 98,955.

reference characters designate corresponding parts throughout theseveral views,

Figure 1 is a perspective view of part of a harness structure embodyingone form of my invention and showing the blocks in a plurality of rowsarranged in applied position in respect thereto;

Fig. 2 is a detail sectional view longitudinally of the furnace chambershowing a number of the harness sections;

Fig. 3 is a top plan view partly in section of one section of theharness; I

Fig. at is an enlarged sectional view of one of the harness sections orunits;

Fig. 5 is an enlarged detail View partly in section showing therelationship between the block in adjacent rows and the air supply tubeor conduit;

Fig. 6 is an enlarged section;

Fig. 7 is a fragmentary bottom plan view;

Fig. 8 is a detail. perspective View of abut-- air conduits or pipesshowing means whereby they may be coupled together and held againstrelative displacement;

Fig. thereof;

Fig. 10 is a sectional view showing adifferent arrangement of two of thehanger sections and units for suspending the block rows to form astepped face on the arch wall,

Fig. 11 is detail side view in elevation of plan view partly in 9 is adetail longitudinal section 'one form of the wedge member for detachablyinterlocking the block with the air supply pipes, and

Fig. 12 is a detail perspective view of a modified form of wedge member.

In a practical embodiment of my invention as illustrated in theaccompanying drawings, the supporting harness is preferably in the formof a plurality of independent seenons or units each of which includes amain air inlet pipe 5. This pipe may be composed of any number ofsections depending upon the width of the furnace chamber, the pipesections having flanges at their ends as indicated at 6 and rigidlyconnected by the bolts 7. The ends of this sectional main pipe extendthrough the side walls of the furnace structurc, and one or both of saidpipe ends is open to the atmosphere and may be provided with a suitableadj nstable damper if desired, to regulate or control thevolume of airentering said pipe.

At spaced points, each pipe section 5 on its under side is-formed withthe oppositely projecting lugs 8. With each pipe 5, a plurality ofrelatively short air supply pipes or conduits 9 are associated, saidconduits being arranged with their longitudinal axes extending at rightangles to the axis of the pipe 5. Each conduit 9 is separately providedwith an angular inlet extension 10 having a flange 11 which is engagedagainst the under side of one pair of the lugs 8 on the pipe 5. As seenin Fig. 1 of the drawings, these lugs and the flange 8 are recessed asat 12 to receive the connecting or clamping bolts 13 whereby the conduit9 is rigidly connected with the pipe with its inlet extension inaccurate registration with the outlet opening 14 provided at the wall ofthe pipe 5. Thus, it will be understood that the series of spacedconduits 9 are supplied with air from the common air intake pipe 5. Asshown in Fig. 4: of the drawings, the ends of the pipe sections orconduits 9 are open and are arranged in registering abutting contactwith the open ends of the corresponding pipe sections of the adjacentair intake pipes 5. Thus, the pipe or conduit sections 9 in theaggregate provide a substantially continuous pipe or conduit extendingfrom the front to the rear end of the furnace structure.

From the spaced air supply pipe or conduit sections 9, the blocksconstituting the arch wall structure are suspended. These blocks 15 areof substantially the same form as those referred to in my co-pendingapplication above identified and are provided with reduced upper endportions 16 having inelined side faces to cooperate with the reinovablewedge members 17 whereby said blocks are detachably interlocked with thetubes or conduits 9. Below these wedge members, the walls of therecesses 18 formed at opposite sides of the reduced part 16 of the blockare spaced from the under side of the conduit 9. Thus, it will be seenthat when the blocks are assembled in rows between the tubes 9, theblocks of adjacent rows having their opposed faces in abutting contactprovide a continuous longitudinal channel 19 beneath each of said tubes.The wall of each of these tubes 9 at its lower sides has a series ofspaced openings 20 therein through which air is supplied to the channel19. Each vertical face of the blocks 15 is provided with the airreceiving passages as shown in my copending application the upperingress ends of which open into the channels 19 so that the air is drawnby the draft through the furnace combustion chamber first into pipe 5,then into the tube or pipe sections 9 and into the distributing channels19 from which it finally passes through the block passages to the underside of the arch wall. The chan nels 19 or the spaces between the archblocks and the under side of the tubes 9 also permit of relativeexpansion of the refractory arch block in the adjacent rows and admit ofsaid block being easily lifted to remove the wedge members 17, so thatwhen necessary one or more of the blocks maybe independently removedfrom the arch wall and replaced by new block or blocks.

As shown in 2 of the drawings, I might provide the tubes 9 of suchlength relative to the thickness of the individual blocks thatfour ofthe blocks may be arranged as shown with the end blocks extended beyondthe ends of the tube sections 9 and upon the ends of the adjacentaligned tube sections while the openings 20 of the tube sections are inline with the meeting faces of the adjacent blocks. On the other hand, Imay arrange three of the blocks on single tube or conduit section 9 sothat the blocks are wholly supported and suspended from this single tubesection, thus enabling me to arrange the individual or separate units ofthe harness as seen in Fig. 10 of the drawings, whereby the arch wall iscomposed of a number of series of transversely extending rows of locksarranged at different vertical elevations so that the inner face of thearch wall presents a stepped appearance. This is sometimes particularlydesirable at the rear end of the furnace combustion chamber adjacent tothe bridge wall.

In Fig. 10, 1 have shown a form of the detachable wedge member 17consisting of a casting having a body wall to engage one of the inclinedsides of the reduced part (3 of the arch block, said body having anopening therein and the webs or flanges 21 at op )osite sides of saidopening, the inner edges of which are curved as clearly shown in Figs. 5and 11 of the drawings for bearing contact upon the upper side of thetube or conduit 9. As an alternative for this-form of the wedge memher,I may'construct said member as shown in Fig. 12 wherein the body platethereof is provided on its inner side with a single vertically disposedweb 22 for engagement upon the tube or pipe section 9, and the low endof the body plate is curved for contact against the lower side of thetube and bifurcated as at 23 so that it will not interfere with the freepassage of air through the outlet openin 20 of the tube and into thechannel 19.

If desired, 1 may provide suitable means for positively coijlpling theends of the aligned conduit sections or tubes 9 with each other. Thus,in Figs. 8 and 9 of the drawings, 1 show a tube 9 having an offsetflangeQ l extending around the tube for substantially one-half of thecircumference thereof and also projecting longitudinally. This flange 21 on its inner face substantially at the center thereof is provided witha lug or boss 25. In assembling the two tube sections, their ends arebrought together, the end of one tube section fitting onto the flange 25of the adjacent tube section and having a recess or seat 26 to receivethe stud or projection 25 on the flange 24. Thus, the two tubes aredetachably locked and held against relative turning movement.

From the foregoing description considered in connection with theaccompanying drawings, the construction, manner of operation andseveraladvantages of my improved arch wall harness will be clearly andfully understood. It will, of course, be apparent that the areas of theseveral pipes or tubes and the passages in the arch blocks are of suchproper relative proportions as to permit of the passage of the air inthe required volume through the harness structure and the block passagesinto the combustion chamber of the furnace. This improved harness may bevery easily and quickly erected, or removed from its applied position,in connection with the furnace structure, and as each section or unit ofthe harness is removed, a plurality of the block rows are at the sametime removed from the arch wall. However, it will be understood that ifdesired, both in installing the harness and removing the same, it may behandled independently of the blocks, and the block rows separatelyarranged in position between the adjacent air supply tubes andinterlocked therewith, or individually detached from the harness andremoved from the wall structure.

While I have herein shown and described an embodiment of my presentimprovements which I have found to be very desirable in actual practice,it will nevertheless, be understood that the invention is susceptible ofconsiderable modification in the form, construction and relativearrangement of its several parts, and I therefore, reserve the privilegeof all such legitimate changes as may be fairly embodied within thespirit and scope of the invention as claimed.

I claim:

1. A supporting harness for furnace arch walls comprising independentremovable units, each consisting of a main air intake pipe and aplurality of relatively short air supply pipes coupled with said mainair pipe and extending at right angles thereto and adapted for alignmentwith similar air sup ply pipes of adjacent harness units.

2. A harness structure for arch walls coinprising a plurality ofindependent removable units each consisting of a main air intake pipeand a plurality of relatively short air supply pipes coupled therewithand extending at right angles thereto, the air supply pipes of adjacentunits being open at their ends and in abutting contact with each other.

3. In combination with a supporting harness for furnace arch wallscomprising independently removable and replaceable sections eachconsisting of a main air intake pipe and a plurality of air supply pipescoupled with said intake pipe and each having an outlet for air enteringthe supply pipe from the in take pipe; arch wall blocks, and means fordetachably suspending a plurality of said blocks between the supplypipes of each unit and supporting the blocks with relation to saidsupply pipes to provide channels extending continuously throughout thelength of said pipes and said channels receiving air from the supplypipe outlets.

4. A supporting harness for furnace arch walls comprising a plurality ofindependently removable units each consisting of a main air intake pipeand a series of relatively short air supply pipes coupled thereto andextending at right angles to said main pipe, and means for detachablyinterlocking a plurality of arch wall blocks with the air supply pipes.

5. A supporting harness for furnace arch walls including wedge membersfor supporting furnace arch blocks, each wedge member comprising a bodyplate for engagement with the arch blocks, and webs on said plate havingcurved edges for contact with a part of the harness.

6, A supporting harness for furnace arch walls including wedge membersfor supporting furnace arch blocks on said harness, each wedge membercomprising a plate, an angular extension on said plate for engagementWith one of the arch blocks, and webs extending between the plate andthe extension, said webs having curved edges for contact with the upperportion of a part of the harness.

7. A supporting harness for furnace arch walls including wedge membersfor supporting furnace arch blocks on said harness, each wedge membercomprising a plate, an angular extension on said plate for engagementwith one of the arch blocks, the free edge of the angular extensionbeing bifurcated, and webs extending between the plate and theextension, said webs having curved edges for contact with the upperportion of a part of the harness.

In testimony that I claim the foregoing as my invention, I have signedmy name hereto.

JOHN FRANCIS BOORAEM.

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